30
INSTALLATION AND WIRING
(3) Connection of the brake unit (BU type)
Connect the BU type brake unit correctly as shown below. Incorrect connection will damage the inverter.
Remove jumpers across terminals HB-PC and TB-HC, then fit a jumper across terminals PC-TB.
(4) Connection of the FR-HC type high power factor converter (FR-HC)
When connecting the high power factor converter (FR-HC) to suppress power harmonics, perform wiring
securely as shown below. Incorrect connection will damage the high power factor converter and inverter.
After making sure that the wiring is correct, set "2" in Pr. 30 "regenerative function selection".
Note: 1. For models 7.5K or less, remove the jumper across terminals PR-PX.
2. The wiring distance between the inverter, brake unit and discharge resistor should be within
2m.
If twisted wires are used, the distance should be within 5m.
3. When the transistor in the brake unit fails, the brake transistor bacomes extremely hot and it has
a chance to get fire. Therefore, install a magnetic contactor on the inverter's power supply side to
shut off current in case of failure.
4. For the power supply of 400V class, install a voltage-reducing transformer.
Motor
Inverter
BU type brake unit
Remove
jumpers.
T(Note4)
MC
U
V
W
HCHBHA TB
P
OCR
PR
NFB
PR
PX
PC
ON
OFF
MC
OCR
N
MC
Remove
jumpers.
IM
Discharge resistor
Connect a
jumper.
N/-
P/+
Power
supply
R
S
T
X10 (Note 3)
X11 (Note 3)
N/–
P/+
RES
SD
Y1 or Y2 RDY RSO SE
Inverter
High power factor converter (FR-HC)
NFB
RST R4S4T4 NP
From FR-HCL02
Power
supply
MC1 MC2
External box
MC1
MC2
FR-HCL01
R4 S4 T4
R3 S3 T3
R2 S2 T2
RS T
R1
S1
T
S (Note 1)
R
(Note 1)
